The IR studies of the status of Cu+ ions in CuZSM-5 CuBeta and in CuMCM-41

J. Datka*, P. Kozyra, E. Kukulska-Zajaç, M. Szutiak, N. Kumar

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

The electron donor properties of Cu+ and the ability to activate adsorbed molecules by π-back donation of d electrons of Cu+ to π* antibonding orbitals of a molecule increases in the order: CuMCM-41 < CuZSM-5 < CuBeta. It was evidenced by IR studies of CO, N2, and NO adsorption. TPD-IR experiments provided information on heterogeneity of Cu+ sites in all the zeolites studied. The experiments on the reduction (in H2) and oxidation (in air) evidenced that the ability of Cu+ to reduction and oxidation depends on zeolite structure. The ability to reduction increased in the order: CuMCM-41 < CuBeta < CuZSM-5, whereas the ability to oxidation increased in the opposite order.

Original languageEnglish
Pages (from-to)1655-1660
Number of pages6
JournalStudies in Surface Science and Catalysis
Volume154 B
DOIs
Publication statusPublished - 2004
MoE publication typeA1 Journal article-refereed

Keywords

  • CuBeta
  • CuMCM-41
  • CuZSM-5
  • IR spectroscopy

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